OIL FIELD CALCULATOR AMERICA LLC

OFC2000: As Essential to Angola's Petroleum Industry as Funge is to Angolan Culture

Message from Our CEO

"After 26 years in this industry, I've learned that true innovation comes from solving real problems, not just creating technology for its own sake."

When I started developing OFC2000 as a Louisiana State University student in 1999, I never imagined it would become the first African petroleum technology presented at the Offshore Technology Conference. But that journey taught me something invaluable: the market doesn't care about your credentials—it cares about your results.

Today, as we expand our operations globally from our Houston headquarters, we remain committed to the same principle that guided us from day one: delivering engineering solutions with proven 2% accuracy that help our clients make better decisions, faster.

We treat every client like family because we understand that behind every project evaluation, there are careers, communities, and countries depending on getting it right. That's why we don't charge overtime—we believe in doing the work first, everything else comes later.

Whether you're a supermajor operator, a national oil company, or a regulatory agency, we bring the same level of dedication and independence to every engagement. Our track record speaks for itself: 350+ projects evaluated, $6B+ validated, and multi-year relationships with some of the world's leading energy institutions.

Welcome to the OIL FIELD CALCULATOR family.

— Silvestre Cassa Iombo
Founder & CEO

About Us

We have conducted a detailed study of the oil market in the USA since 2021, when we started OIL FIELD CALCULATOR AMERICA LLC. Our study is now complete, and we are pursuing contracts worldwide.

We are a Houston-based company with an office in Angola, Africa—that's where we started. We brought our technology to America.

OFC2000 is Angola's emblematic calculator and unique in its kind worldwide. It is patented in both Angola and the United States. OIL FIELD CALCULATOR is a true engineering company. OFC2000 is not simply software—it is a true work of engineering created by an Angolan.

Immediate Discovery Evaluation

When a new petroleum discovery is made, OFC2000 is used immediately due to its speed in obtaining results for rapid decision-making. In fractions of a second, we can generate costs and economic evaluations, enabling operators and regulators to make critical decisions quickly after discoveries.

Proven with Major Operators:

TotalEnergies - Presented OFC2000, which rejected using QUESTOR and opened doors for us.
Chevron - In 2018, we conducted cost comparisons and they praised our calculator.
We are present in some of the industry's major discoveries.

Our Competitive Position: We Are Our Own Competitor

We continuously innovate and improve our technology, setting new industry standards with each advancement. Other companies cannot compete because by the time they attempt to replicate what we've built—the physical calculator, the software, the testing, and the multi-industry expertise—we have already moved forward to the next innovation.

We don't follow the market; we create it.

350+ Projects Evaluated

2% Cost Accuracy

26 Years Experience

$6B+ Projects Validated

Why Leading Organizations Choose OFC2000

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Speed That Transforms Decision-Making

Evaluate 30-40 petroleum blocks in just 2 hours. When TotalEnergies sees a new discovery, they need answers immediately—not in weeks. OFC2000 delivers instant economic evaluations that let you act while opportunities are fresh.

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Accuracy That Protects Billions

2% cost accuracy validated by SONANGOL Board on major projects. When BP missed cost overruns on Project Platina, OFC2000 caught them. Our precision has validated over $6 billion in petroleum investments.

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Independence You Can Trust

No vendor affiliations. No conflicts of interest. When TotalEnergies tested OFC2000 against Questor software, we won—and they opened doors for us. Pure engineering excellence, unbiased results.

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Innovation That Sets Standards

First African petroleum technology at OTC 2022. USA Patent holder. While competitors copy old methods, we create new standards. By the time others catch up to our calculator, we've already released the next innovation.

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Track Record That Speaks Volumes

5-year contracts with SONANGOL and ANPG. Trusted by ExxonMobil, Chevron, BP, and TotalEnergies. 350+ projects evaluated worldwide. Multi-year relationships prove sustained excellence, not one-time luck.

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Complete Value Chain Coverage

From exploration to production optimization, from mature fields to new discoveries, from oil & gas to minerals. One calculator, complete petroleum engineering solutions. No other tool covers what we cover.

Ready to Experience the OFC2000 Advantage?

Join the supermajors, national oil companies, and regulatory agencies who trust OFC2000 for their most critical petroleum engineering decisions.

📧 [email protected] | 📱 +1 (713) 231-3958

Three Business Lines

1. CONSULTANCY SERVICES

Independent Petroleum Engineering Excellence

Our consultancy services focus on oil and gas with proven petroleum engineering expertise spanning the complete value chain from exploration to production optimization.

Cost Estimation & Validation

Independent validation of CAPEX and OPEX with 2% proven accuracy
Benchmarking, risk assessment, and optimization
350+ projects validated

$50K - $200K | 2-6 weeks

Mature & Marginal Field Optimization

Reverse declining production
Well-by-well intervention assessment
ExxonMobil methodologies

$75K - $250K | 4-8 weeks

Portfolio Analysis

Multi-asset evaluation
Comparative economics
Strategic capital allocation

$100K - $300K | 6-10 weeks

Technology Assessment

Independent evaluation of new technologies
Commercial viability analysis
Patent holder insight

$40K - $150K | 3-6 weeks

Due Diligence (M&A)

Technical and commercial evaluation
Risk identification
$6B+ validated

$75K - $300K | 4-8 weeks

💎 Mineral Appraisal

Evaluation of mineral assets
Resource estimation and classification
Financial viability analysis

$50K - $200K | 3-6 weeks

🔬 What Our Calculator Does:

Our calculator estimates in great depth the size of minerals, costs, and reserves, plus complete economic analysis. Get results very fast and bring real value to your business.

⚖️ Multi-Mineral Comparison: Compare oil & gas, diamonds, gold, phosphate—investors decide based on returns. That's our value.

⚙️ Process Efficiency: Calculate mineral processing efficiency and identify improvement actions.

🗺️ Complete Roadmap: From exploration to final lapidation (polishing/cutting).

Strategic Advisory

Field development planning
Ongoing strategic support
Multi-year relationships

$100K - $400K | 8-16 weeks

FREE INITIAL CONSULTATION AVAILABLE

2. PHYSICAL CALCULATORS

Retail Distribution - Tested & Proven Technology

We developed the first calculator to project petroleum infrastructure and estimate costs. Unlike competitors who only offer software solutions, we have physical calculators that have been tested and proven in real-world applications.

Features:

Oil value chain calculations
Petroleum infrastructure projections
Cost estimation accuracy: 2% validated
Complete upstream oil and gas applications
Real-world tested and proven

Available for retail distribution worldwide

3. SOFTWARE SOLUTIONS

Install on Your Computer or Mobile Device

Our software calculators are built with the same engineering standards as our physical instruments, providing reliable petroleum infrastructure projections and cost estimates.

Software Capabilities:

Complete oil and gas value chain calculations
Petroleum engineering solutions
Mature and marginal field optimization
Cost estimation and validation
Portfolio analysis and strategic planning

Platforms: Available for computer and mobile phone installation

The OFC2000 Advantage

OFC2000 is our proprietary, world-class petroleum engineering calculator providing comprehensive engineering solutions.

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Speed

Evaluate 30-40 blocks in 2 hours

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Accuracy

2% precision validated on major projects

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Independence

No third-party software required

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Proven

Deployed in national oil company facilities

Solving Real Engineering Solutions in Oil & Gas

We solve real petroleum engineering challenges across the complete oil and gas value chain. Our calculators are not theoretical tools—they address actual problems faced by petroleum engineers in the field.

Special Focus: Marginal & Mature Fields

One of the biggest challenges in the petroleum industry is managing marginal and mature fields. OIL FIELD CALCULATOR already has solutions for mature and marginal fields built into our application.

Production Optimization

Well-by-well intervention assessment
Workover prioritization
Production decline analysis
EOR evaluation

Economic Viability

Marginal field economics
Break-even analysis
Risk-adjusted returns
Infrastructure optimization

Capital Allocation

Investment prioritization
Budget optimization
Abandonment economics
Field life extension

Regulatory Tools

Operator plan assessment
Development proposal evaluation
Policy decision support
Performance monitoring

OFC2000 for ANPG - Proven Regulatory Support

The OFC2000 Advantage for ANPG

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Speed

Evaluate 30-40 blocks in 2 hours. Rapid response to urgent regulatory questions.

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Accuracy

2% precision validated on major Angolan projects (SONANGOL Lontra & Cameia).

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Independence

No dependencies or conflicts of interest. Completely independent analysis.

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Proven

5-year ANPG track record (2020-2025). $6B+ projects validated.

Core Capabilities for ANPG

Rapid Block Evaluation

Evaluate 30-40 blocks in 2 hours. Complete onshore and offshore portfolio analysis. Fast turnaround for licensing decisions.

Strategic Licensing Support

Independent analysis for national licensing rounds. Evaluation of operator proposals. Risk identification and mitigation.

Cost Validation & Oversight

2% accuracy validated. Independent CAPEX and OPEX validation. Benchmarking against international standards.

Portfolio Optimization

Multi-asset evaluation across all blocks. Comparative economics. Strategic capital allocation recommendations.

ANPG Track Record (5-year contract 2020-2025):

Strategic advisory supporting national licensing decisions
Evaluated all operating blocks across Angola
Rapid response capability for regulatory decisions
Independent oversight of operator submissions

Industry Recognition

                First African petroleum technology presented at the Offshore Technology Conference (OTC 2022, Houston)
                USA Patent holder for comprehensive industrial calculator methodology
Validated by SONANGOL Board with 2% accuracy on Lontra & Cameia projects
26 years of proven expertise
350+ projects evaluated worldwide
$6B+ projects validated

            

Trusted By Leading Organizations

SONANGOL

ANPG

EXXONMOBIL

TOTALENERGIES

CHEVRON

SONANGOL (Angola National Oil Company)

4-year software license (2021-2025)
OFC2000 deployed across national oil company facilities
Evaluated all operating blocks across Angola
10-year relationship from validation to deployment

ANPG (Angola Regulatory Agency)

5-year consultancy contract (2020-2025)
Strategic advisory supporting national licensing decisions
Evaluated 30-40 blocks in 2 hours
Complete onshore and offshore portfolio analysis

Major Project Validations

✓ SONANGOL Lontra & Cameia

2% accuracy validated by Board (2015)

✓ BP Project Platina

Identified cost overruns missed by internal systems

✓ TotalEnergies CLOV

More accurate than Questor software (2007)

✓ Reserve Validation

All blocks with Gaffney, Cline (2014)

Why Choose Us

Independence & Objectivity

No vendor affiliations
No technology conflicts of interest
Unbiased analysis and recommendations
Client interests paramount

Practical Experience

Built and commercialized technology
Worked for supermajor operators
Government and regulatory experience
Entrepreneurial success

Proven Track Record

350+ projects evaluated worldwide
2% accuracy proven and validated
5+ years serving national institutions
Multi-year relationships with clients

Results Focus

Actionable recommendations, not just analysis
Implementation support available
ROI-driven approach
Clear deliverables and timelines

Our Philosophy

"We treat our clients like family."

We don't charge overtime because we believe in doing the work first—everything else comes later. Our goal is to take something very complex and simplify it so you understand the pathway forward. Excellence isn't just about technical capability; it's about dedication, humility, and understanding your needs.

About Our Founder

Silvestre Cassa Iombo

CEO | Founder | Independent Petroleum Engineering Consultant

Patent Holder | OTC Presenter | Louisiana State University
26 years petroleum engineering experience
Supermajor trained (ExxonMobil, TotalEnergies, BP)
5+ years with SONANGOL and ANPG
USA Patent holder
2% cost estimation accuracy validated by clients

"From LSU student spreadsheet (1999) to multi-year national contracts (2020-2025) to first African technology at OTC (2022)—proven innovation, validated execution, sustained results."